Experimental Study on the Technology of Large Particle Ash Interception for SCR De-NOx Equipment

doi:10.11930/j.issn.1004-9649.201611118

Abstract

Abstract: To solve the problem of LPA (Large Particle Ash) plugging in the SCR de-NO_x equipment, the study on the technology of LPA interception is performed with the usage of the physical model based experiments. The effects of the hole pattern, the external structure and the mounting position of the LPA screen on its ash removal efficiency and the system drag force are analyzed. Multiple combination schemes of the dust hopper, the deflector and the LPA screen are compared for the best technical solution. The experimental results demonstrate that the ash removal efficiency of the LPA screen with rectangular opening is better than that with square or hexagonal opening. The drag force of the LPA screen varies inversely to the third power of the opening ratio. There is no obvious difference between the pleated and flat LPA screens in terms of the ash removal efficiency and the drag force. It is observed that the ash removal efficiency of the combination scheme of the deflector, the deep dust hopper and the low LPA screen is more than 95% when they are installed in the outlet of the economizer. The ash removal efficiency can be further improved when another dust hopper and a broken-line back wall are installed in the inlet of the vertical flue.

Key words: power plant de-NO_x, SCR, large particle ash, interception technology, physical model experiment

CLC Number:

TM621
X511

JIN Lipeng, XIE Xinhua, HUANG Fei, LU Chengzheng, ZHOU Jian, SONG Yubao. Experimental Study on the Technology of Large Particle Ash Interception for SCR De-NO_x Equipment[J]. Electric Power, 2018, 51(2): 156-161,168.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201611118

https://www.electricpower.com.cn/EN/Y2018/V51/I2/156

References

[1] 中国电力企业联合会. 中国电力行业年度发展报告2016[R]. 北京: 中国电力企业联合会, 2016.
[2] 张杨, 杨用龙, 冯前伟, 等. 燃煤电厂SCR烟气脱硝改造工程关键技术[J]. 中国电力, 2015, 48(4): 32-35.
ZHANG Yang, YANG Yonglong, FENG Qianwei, et al. Key technical issues of SCR denitrification from coal-fired boiler flue gas [J]. Electric Power, 2015, 48(4): 32-35.
[3] 孙叶柱, 王义兵, 梁学东, 等. 火电厂SCR烟气脱硝反应器前设置灰斗及增加烟道截面的探讨[J]. 电力建设, 2011, 32(12): 64-68.
SUN Yezhu, WANG Yibing, LIANG Xuedong, et al. Discussion on installation of ash hopper and enlargement of flue section before SCR for coal-fired power plant [J]. Electric Power Construction, 2011, 32(12): 64-68.
[4] 何金亮, 金理鹏, 卢承政, 等. 燃煤电站SCR烟气脱硝系统运行典型故障诊断[J]. 中国电力, 2016, 49(8): 148-153.
HE Jinliang, JIN Lipeng, LU Chengzheng, et al. Diagnosis of typical operation faults of SCR flue gas denitrification system in coal-fired power plants [J]. Electric Power, 2016, 49(8): 148-153.
[5] 肖雨亭, 徐莉, 贾曼, 等. 蜂窝式脱硝催化剂在烟气中磨损行为的模拟研究[J]. 中国电力, 2012, 45(12): 96-98.
XIAO Yuting, XU Li, JIA Man, et al. Research on abrasion simulation of de-NO_x honeycomb catalysts in flue gas[J]. Electric Power, 2012, 45(12): 96-98.
[6] 金理鹏, 王勇, 宋玉宝, 等. 烟气参数对选择性催化还原系统设计的影响分析[J]. 热力发电, 2013, 42(8): 124-127.
JIN Lipeng, WANG Yong, SONG Yubao, et al. Effect of viscous fly ash on the SCR system design [J]. Thermal Power Generation, 2013, 42(8): 124-127.
[7] 刘红辉, 刘伟, 黄锐, 等. 燃煤电厂SCR脱硝催化剂失活及其再生性能研究[J]. 中国电力, 2014, 47(4): 139-143.
LIU Honghui, LIU Wei, HUANG Rui, et al. Study on performance of deactivated and regenerated catalysts for coal-fired power plant SCR denitration[J]. Electric Power, 2014, 47(4): 139-143.
[8] 刘含笑, 郦建国, 姚宇平, 等. 一种布置在ESP进口封头的微颗粒捕集增效装置研究和开发[J]. 中国电力, 2015, 48(8): 1-7.
LIU Hanxiao, LI Jianguo, YAO Yuping, et al. Research and development of enhanced PM_2.5 collection device installed in the ESP inlet hood[J]. Electric Power, 2015, 48(8): 1-7.
[9] EPRI. Large particle ash mitigation measures: preliminary findings from CFD modeling[R]. Palo Alto: EPRI, 2005.
[10] 周健. 特变电工2×350 MW超临界工程脱硝流场CFD数值模拟与物理模型试验报告[R]. 西安: 西安热工研究院有限公司, 2012.

[1]	ZHU Qianlong, JIN Xiaoqiang, WANG Xuli, SU Fanya, DENG Tianbai, TAO Jun. Minimum Risk Quantification Method for Equivalent Error Threshold of Wind Farm Based on Bayes Criterion [J]. Electric Power, 2025, 58(4): 98-106.
[2]	Xue WANG, Lin LIU, Wendi LIU, Yanpeng ZHAI, Ling YANG, Fangyuan XU, Yan GAO, Jixin ZHANG. A Novel Inertia Delay Optimization Control Strategy for New Power Systems Based on Crisscross Optimization [J]. Electric Power, 2024, 57(7): 12-20.
[3]	Hang LIU, Hao SHEN, Yong YANG, Ling JI, Yang YU. Load Forecast of Electric Trucks Aggregation Based on Higher-order Markov Chains [J]. Electric Power, 2024, 57(5): 61-69.
[4]	Jian ZHOU, Nan FENG, Yiping JI, Yuyao FENG, Shuai WANG, Shaoyan LI. A Decision-making Optimization Method for Network Reconfiguration of Power System With New Energy Considering the Synergistic Support of Source-grid [J]. Electric Power, 2024, 57(10): 150-157.
[5]	Daxing WANG, Yan Ning, Jingpei WANG, Yang XU, Jun BI, Mingbiao ZHOU, Peng WANG. Robust Simplified Modeling of Microgrid in the Context of Constructing New Power Systems [J]. Electric Power, 2024, 57(1): 148-157.
[6]	Jing WANG, Yi YUAN, Yinchi SHAO, Jinqi ZHANG, Ran DING, Yanjiang GONG. Multi-Objective Cluster Classification and Voltage Control Approach for Active Distribution Network Considering Resource Reserve Degree [J]. Electric Power, 2023, 56(12): 69-79.
[7]	Haifei MA, Wei TENG, Dikang PENG, Yibing LIU, Tao JIN. Compound Fault Feature Extraction of Wind Power Gearbox Based on DRS and Improved Autogram [J]. Electric Power, 2023, 56(10): 71-79.
[8]	LIU Yi. A Pilot-scale Research on SO₃ Control in Flue Gas of Coal Fired Power Plant [J]. Electric Power, 2022, 55(7): 201-208.
[9]	XIONG Wei, ZHANG Yue, DOU Jianzhong, JIANG Baofeng, SHAN Lianfei. Construction and Application of Discrete-Time-Domain Framework -based Power-Grid State Space [J]. Electric Power, 2022, 55(6): 111-117.
[10]	WU Yaning, LUO Yi, ZHOU Shengcun, TANG Muyi, YI Xuancheng. A Fast Static Voltage Stability Contingency Screening and Ranking Method Considering Source-Load Power Fluctuation [J]. Electric Power, 2022, 55(11): 29-40.
[11]	CHEN Chen, JIA Shuya, LIU Dingjia, JIA Haiwei, ZHANG Ying, QU Yanchao. Research on the Activation Change of Plate-Type Anti-arsenic-poisoning SCR De-NO_x Catalyst in High-Arsenic Flue Gas [J]. Electric Power, 2022, 55(11): 202-208.
[12]	ZENG Cong, HUANG Qiang, CHEN De, ZHENG Xiaoying, MENG Anbo. Optimal Power Flow Calculation with Improved Crisscross Optimization Algorithm [J]. Electric Power, 2021, 54(9): 9-16.
[13]	LIU Zhitan, YAO Jie, ZHUANG Ke, YU Lemeng, ZHOU Kai. Comparison of Characteristics of SCR-DeNO_x Catalyst for Gas-Turbine Units and Coal-Fired Units [J]. Electric Power, 2021, 54(6): 145-152.
[14]	YAN Min, ZHANG Yang, GUO Bowen, ZHU Yue. Analysis on the Optimization of SCR Denitrification System Based on Life Cycle Cost [J]. Electric Power, 2021, 54(3): 191-196.
[15]	HUA Chenfei, ZHU Lin, YAO Jie, ZHUANG Ke. Research on the Quality and Characteristics of Carriers for Resource Reuse of Waste Flue Gas Denitration Catalyst [J]. Electric Power, 2021, 54(2): 197-204.

Experimental Study on the Technology of Large Particle Ash Interception for SCR De-NO_x Equipment

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics